<div class=container>
    <ng-container *ngIf="selectedMenuItem === 'overlay-snap'">
      <app-overlay-snap></app-overlay-snap>
    </ng-container>
    <ng-container *ngIf="selectedMenuItem === 'mask-area'">
    </ng-container>
    <ng-container *ngIf="selectedMenuItem === 'rule-setting'">
    </ng-container>
    <ng-container *ngIf="selectedMenuItem === 'intel-advanced'">
    </ng-container>
<div></div>